Semimetallic packing



, Aug, 7; W23.

W. R. BELDAM SEMI'METALLIC PACKING Filed July 13, 1920 Patented Aug. 7, 1923.

UNITED STATES WILLIAM ROBERT BELDA M, OF LONDON, ENGLAND.

snmmnrannc meme.

' Application'flled July 13, 1920. Serial No. 396,030.

To all whom it may concern."

Be it known that I, WILLIAM ROBERT BELDA-M, a subject of the King of England, residing in London, England, have invented certain new and useful Improvements in Semimctallic Packings, of which the followin" is a specification.

This invention is for improvements in or relating to semi-metallic packings, that is to say packings comprising in combination a flexible composition s tripformed with an open channel extending inwardly from one face of the strip and longitudinally thereof, and metal filling blocks disposed in thechanno]. The flexible strip may be of the usual asbestos composition of known type.

According to the'present invention in such a melting the metal filling blocks together su stantially fill the channels and each of the blocks is formed with a spike or spikes driven into the bottom wall of the channel to retain the blocks in position within the channel.

Preferably the channel is formed with side walls which are. inclined outwardly from the lateral margins of the bottom wall, and those surfaces of each block which engage with the walls of the channel are shaped to conform to the configuration of the'walls.

A feature of. the invention comprises a filling blockthe cross-section of which, in a plane transverse to the length of the channel, is such 'as either to fill substantially half the 3 cross-section of the channel or to fill suhstanv tially the whole cross-sectionthereof.-

According to another feature of the invention a block is formed with a middle portion of such cross-section as substantially to 4 fill the whole cross-section of the channel and with projections on each side of the middle portion to extend longitudinally! of the .channel on opposite sides of the centre line thereof each projection being such as to fill substantially half the cross-section of the channel, and with a spike extendingonly fromthe. middle portion. 7 Thus, the block is stopped in cross-section.

Other features of the invention comprise the formation of the filling blocks with a shoulder to be seated on the bottom wall. of the channel, and b the curving of the bears ing faces of the b ocks and the rounding of be that of the len 'ture of a part with which the packing is to the part upon which they bear.

the butting sides of the blocks as will be more fully described hereinafter.

Some preferred forms of the invention will-now be described in detail by way of enample only and with the aid of the accompanying drawings in which- Figure l is a perspective view of a portion of the flexible strip;

Figure 2 is a similar view of the strip and filling blocks curved round to conform to the part to which it is to be applied;

Figure 3 shows the arrangement of the blocks shown in Figure 2 in their relative positions when the strip is laid flat;

Figure 4: is a section on the line IV-IV of Figure 3, and

7 Figures 5, 6 and '7 illustrate respectively modified forms of filling block. As shown in Figure 1, the flexible strip 1 I is formed with a channel of which the side wa%]lls slope inwardly ,towards a flat bottom In Figures 2, 3 and 4 filling blocks according to one form are illustrated and comprise a plurality of similar blocks 2 each formed with a central spike 3. Each block is such as to fill substantially halt the cross-section of the channel in the strip as shown clearly in Figures 2 and 4, and has a sloping face i to engage a side wall of the channel.

The bearing'suritace 5 of each block is dished as shown, in the direction which will h of the channel when the block is in position. The dishing or curvature of the bearing faces is not necessarily suchv as to conform to one particular curva- I10 be employed but may be approximately suited to several difierent degrees of curvature. In use, it is found that it the faces 5 do not, actually hear evenly on the periphery of the part with which they will be in contact, they! will quickly wear down so as to hear evenly on that part owin to the fact that the blocksare madeof meta which is lesshard" than is The outercorners 6 of the butting sides of adjacent blocks are also rounded to render the studded band flexible. The rounding of the shoulders is preferably such as to accommodate a degree of curvature of the smallest diameter for which the packing is likely to used... I

the bottom; wall of the channel when the spikes have been driven home.

In a modified form of block shown in Figure 5, two spikes 3 are provided and the block is of such cross-section as to substan-' 'ections. All the butting cornersof such' a nel extend tially fill the whole cross-section of the chan= nel. A surface 7 corresponding to the shouldered .surfaces 7 in Figures 2, 3 and 4, is formed between the spikes3. The" block in this case is similarly formed with a dished surface 5 and rounded corners 6.

In the modification shown in Figure 6,

the whole block is carried down to a-pointed or spiked extremity 3 without the formation of any shouldered surface corresponding to the surface 7 previously described. This block also has a dished bearing surface 5 and rounded corners 6.

Obviously the blocks illustrated in Figures 5 and (i could each be formed in two portions to lie side by side within the channel in a similar manner to the blocks described in connection with Figures 2, 3 and 4.

cross-section, is illustrated having a dished bearing surface 5. The middle portion of the block is of such'cross-section as sub.-

stantially to fill the whole of the cross-sec- 1 tion of the.channel and has two side projections extending from 'opposite sides of a centre line and of such cross-section as to fill substantially ,only'half of the cross-section of the channel. A spike 3 extends from the middle rtion only and shouldered surfaces 7 are ormedon each side of the spike and at the inner extremities of the side prolock are rounded at 6. It is obvious that when a pluralit of them blocks are driven into the chann of the strip 1 the side pro- ]ectlon of'one block will fit in the space aflorded between the adjacent side projectioniof the block next to it and of the wall of the channel so that in the entire le h of the strip the channel is substantially ed with metal.

It will be obvious that in addition to the forms described other forms of block could be employed without departing from the spirit of the invention.

.What I claim as an invention and desire to secure by, Letters atent is:-

1.; A2 semi-metallic peckin comprising,

in combination, a single flexib e composition strip having formed therein an open chs'n T inwardly from one face of it and longitu -w lllthemf, and a plurality of sar metal blocks positioned in ad open channel and together substantially es wee fas ination and formed with nel and together substantially with a. 1:14 W;

and a piiimiity the channei, each cf said blocks at least one spike projecting beyond the mainbody thereof and driven into the tom wall of the channel without clenching to retain .'the blocks in position in the channel.

2. A semi-metallic packing, comprising, in combination, a single fiexib e composition strip having formed therein-an open channel extending inwardly from one face of it andlongitudinally thereof, with the side, walls of the channel diverging outwardly from the lateral margins of the bottom wall thereof, and a plurality of similar metal filling'blocks positioned in said 0 n chanlling the channel, each of said filling blocks being formed with at least .one spike projecting beyond the main body thereof and driven into the bottom wall of the channel. without clenching to retain the blocks in position in the channel, the surfaces of block'which engage the walls of the channel being shaped to conform to the configuration of said walls.

3. A semi-metallic packing comprising in combination a flexible composition trip formed with an open channel extending in- In' Figure 7 a block, which is stepped in.

wardly from one face of it and longitudimally thereof, and a plurality of metal filling-blocks which together substantially till the channel, each said bock havi a nuddle portion of such crom-section as su tially to fill the whole cross-section of the channel and projections one on each side of the middle portion to extend longitudinally of the channel on opposite sides 'of the centre line thereof and of such cross-section as to fill zililbstaritiall hallf the crosis-ksec}.ionthgf the anne,an at eastonesp e, or pose described, Put 4. A semi-metallic packing comprising combination a 'fiexi le composition strip formed with an open channel extending inwardly from one face of it and longitudinall thereof, and a plurality of metal fillinglocks which ther substantially fill the channel, each sai block havingszmiddle portion of such cross-section as an ntiall to fill the whole cross-section of the ch and projections one on each side of the middle portion to extend longitudinally of the channel on op its sides of the centre line thereof and 0 such cross-section to fill substantially half the cross-section of the channel, anda spike extending only run the middle rtion of the block with e. shoulder formed. at the junctionof the root of the tooth and the block 5. A "block which is for 4.4 a e ed fiesihie s; iii-iv. which tegjthsr mmtmstisiiy did and an open is c e calm. nel 1 h (of wedge fen-names. end fee with at reset ens spike -'-r a tese and with a flat surface which afiords a shoulder at its junction with the root of the spike and is of such form as to fit along the bottom wall of the channel.

6. A metal filling-block which is for use with a semi-metallic packing comprising an open channelled flexible composition strip and a plurality of similar filling-blocks which together substantially fill the channel the said block being of wedge formation an formed with a bearing face which is dished in a direction which will be that of the length of the channel when the block is in position, and provided with a spike adapted to be driven into the flexible composition 0 the strip without clenching, for the purpose described.

7. A metal filling-block which is for use with a semi-metallic packing comprising a channeled flexible composition strip and a plurality of similar filling-blocks which together substantially fill the channel, the said block being formed with those of its butting corners at the mouth of the channel rounded oil, for the purpose described.

8. A metal filling-block which is for use with a semi-metallic packing comprisin a channelled flexible composition strip an a plurailty of similar filling-blocks which together substantially fill the channel, the said block having a middle portion of such cross-section as substantially to fill the whole cross-section of the channel and projections one on each side of the middle portion to extend longitudinally of the channel on opposite sides of the centre line thereof and ofsuch cross-section as to fill substantially half the cross-section of the channel, and at least one spike adapted to be driven into the flexible body of the packing, for the purpose described.

9. A metal filling-block which is for use with a semi-metallic packing comprisin a channelled flexible composition strip an a plurality of similar filling-blocks which together substantially fill the channel, the said block having a middle portion of such crosssection as substantially to fill the whole which together substantially fill the channel,

the said. blocks having a middle portion of such cross section as to substantially fill the whole cross section of the channel, and oil'- set projections one on each side of the mid dleportion to extend longitudinally of the channel, said projections being of such cross section as to substantially fill half the cross section of the channel, and at least one spike on said block adapted to be driven into the flexible'body of the packing, for the purpose described.

In testimony whereof I ailix my signature. WILLIAM ROBERT BELDAM. 

